This could be like boiling water. it starts in liquid form. Then you boil it, and some evaporates. Then it gathers over time on the pot lid, and in some time you'll have a mini rain shower as it condenses and falls back into the pot.
We want the bird to fly with velocity Vb=100 km/h with an angle θ relative to the ground so that the bird fly due south relative to the ground.From figure which is attached we got
